Double-walled vessel or the like.



PATENTED MAY 26, 1908.

R. BURGER. DOUBLE WALLED VESSEL OR THE LIKE.

APPLICATION FILED APR. 13, 1907.

UNITED STATES PATENT OFFICE.

REINHOLD BURGER, OF BERLIN, GERMANY, ASSIGNOR TO AMERIGAN THERMOS BOTTLE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF MAINE.

DOUBLE-WAIELED VESSEL OR THE LIKE.-

Specification of Letters Patent.

' Patented May 26, 1908.

' Application filed April 13, 1907. Serial No. 368,077.

To all whom it may concern:

Be it known that I, REINHOLD BURGER, manufacturer, a subject of the Em eror of Germany, and resident of No. 2 EC ausseestrasse, Berlin, in the German Empire, have invented a new and useful Improvement in Double-Walled Vessels or the Like, of which the following is a s ecification.

My invention re ates to a new and useful article of manufacture comprising inner and outer glass vessels inclosing a rarefied s ace between them. Such vessels are used for hot and cold drinks, eatables, etc. and are made in various forms and sizes.

The object of my present invention is to provide an elastic stiffening ring interposed etween the inner and outer vessels, said elastic ring having parts which are directly pressed by the stretching of the ring over the inner vessel, against the adjacent walls of both vessels This elastic stiffening ring serves to reinforce the two vessels and thus overcome the liability of the vessels to become easily broken at their connecting point owing to vibrations of the internal vessel.

In the accompanying drawings, Figure ,1 is a vertical central section through the vessel, Fig. 2 a horizontal section taken in the plane of the line A-A of Fig. 1, Fig. 3 is a plan view of a star-shaped elastic stiffening ring, Fig. 4 is a plan view of around stiffening ring and Fig. 5 is a lan view of a resilient ring having separate stiffening parts.

The double-walled vessel comprises an inner vessel 1 and an outer vessel 2 inclosing a rarefied space 3*between them, said vessels being connected only at the opening or mouth.

An elastic stiffening ring of non heat conducting material is stretched over the inner vessel, thereby causing the ring to be directly pressed against the adjacent Walls of both vessels. This elastic stiffening ring may be made in various shapes and when so made that it will inclose the space between the inner and outer walls, as shown in Figs. 1, 2 and 4 it is made porous so that the air may be readily exhausted from the said s ace both above and below the said ring. The rin 4 shown in Figs. 1 and 2 has straight waIls, while the ring 4* shown in Fig. 4 may have round walls. A star sha ed ring 5 may be employed, such as that sli that parts only of the said ring are directly pressed against the adjacent walls of both vessels when the ring is stretched over the inner vessel.

In Fig. 5, I have shown the elastic stiffening ring as comprising a resilient ring] having separated stiffening parts 6 thereon arrange( to directly press against the adjacent walls of both vessels. This ring 7 is made resilient by dividing the same so that the ends of the ring may be brou ht further apart or nearer together according to the position of the ring over the inner vessel.

What I claim is:

1. A new article of manufacture comprising inner and outer vessels inclosing a rare-' fied space between them and an elastic stiffening ring within said space, forced around the inner vessel and abutting against the adjacent walls of both vessels.

2. A new article of manufacture comprising inner and outer vessels inclosing a rarefied space between them and a ring of resilient material forced around the inner vessel within said s ace and having stifiening parts thereon whic directly press against the adjacent walls of both vessels.

own in Fig. 3, so-

In witness whereof I have hereunto set my hand in presence of two witnesses.

REINHOLD BURGER.

Witnesses:

HENRY HAsPER, VVOLDEMAR I'IAUPT. 

